Current-converting means



Jan. 12 1926.

- 1,569,541 F. J. FISCHER CURRENT CONVERTI NG MEANS Filed April 20, 1922 jffforney Patented 1.... 12, 1926.. I

UNITED STATES FRANZ JOSE! FISCHER, OF DRESDEN, GERMANY.

CURRENT-CONVERTING MEANS.

Application filed April 20, 1922 Serial No. 555,754.

To all whom it may com-em:

Be it known that I, FRANZ J osnr FISCHER,

a citizen of Germany, residing at Dresden,

Germany, have invented certain new and useful Improvements in Current-Converting Means, of which the following is a specification.

My invention refers to devices for converting electric currents and more especially to a device operating in a manner similar to a transformer and designed mainly for very high voltages. The device according-to the invention can be applied for instance for the purposes of measuring and testing high current plants. It has the outward appearance of the well known normal high current ducts and can be arranged in a similar manner, but serves at the same time for converting a primary current into a secondary current or for inductively connecting two circuits which are not conductively connected, thus simultaneously serving as a duct or leading-in and as a current converting means. It combines, high efficiency when used for converting and similar purposes with great security against puncture and is distinguished from devices of this kind as heretofore constructed by its outer coil being more easily wound and by the comparative simplicity and low cost of manufacture of extensive and even very large size pieces of apparatus of the kind referred to.

The current converter according to the present invention substantially consists of a bulb-like bottle shaped body made up,. at least in its neck portion, of insulating material and the bulging portion of which is traversed by a passage or support of insulating material and upon the outer surface of which one of the coils and preferably the primary coil is wound, while the second coil, preferablythe secondary one, together w th its iron core is suitably mounted on the interior thereof.

' In thedrawings aflixed to this specification and forming part thereof a device embodying-my invention is illustrated vby way of example.

In the drawings- Fig. 1 is a longitudinal section of a device comprising a body con'slstmg of lnsulatlng material t passage spoken of above being shown in cross section.

roughout, the support or tubular Fig. 2 is another longitudinal section run ning the entire length of the support or'tubular passage while Fig. 3 is a cross sectlon taken at about halfthe height of the support or tubularpassage, the core of the inner coil being shown 1n elevation.

Referring to the drawings, A is the bulb or. bottle shaped bottomless body consisting of insulating material, preferably porcelain, throughout. The bulb or bulging portion 1 contains a support or tubular passage 2 integral therewith and consisting of the same material, said passage havingthe form of a tube of cornered cross section with rounded edges. The primary coil B is wound around the tube 2,. this being easily efl'ected owing to the missing bottom. The conducting wire or coil ends I), b of the primary coil project through the neck portion 3 of the body A, the opening 4: of the neck portion 3 being closed by .a lid or cap 5.

Within the tubular passage 2 there is arranged the iron core C with the secondary coil D. 6 is an insulating tube carrying the coil windings. Outside the body A the core C is surrounded and closed by a ring a, so as to constitute a kind. of barrel-shaped core. The ends of the secondary winding are connected with the terminals 7.

Upon the body A which is provided with annular grooves 8 above the support or tubular passage 2 an angularly flanged rin E. is secured by being cemented thereon an to which the terminals 7 are'insulatingly attached. A metallic container F constitutin a bottom closure for the body A is-attached to the circular flange of ring E and is filled together with the support or tubular passage 2 with oil or with some suitable di-electric material capable of hardening after being filled in.

Instead of designing the device as shown in the drawings I may however also provide a simple flat bottom of metal or of insulating material applied to the lower edge of the body A so as to form a closure.

The cavity of the entire body may and should preferably be filled with oil or with some other liquid or solidifying or gaseous insulating material.

My invention is obviously not restricted to the modifications and forms of constructions herein shown and described but it is capable of various other modifications and forms of embodiments, and it is susceptible of various changes and modifications in the relativejarrangement of parts and connections to correspond to existin conditions of use, but without deviating om the spirit of my invention.

I claim:

1. In a device for convertin electric currents in combinatlon an annu ar horizontal core, comprising a shell and a diametrical transverse bar, a hollow body comprising a transverse tube adapted to receive said transverse bar, and a tank ada ted to receive a dielectric surrounding sai body. and said core and extending beyond the levelo f said transverse bar.

- 2.- In a device for convertin rents in combination an annu ar horizontal core, comprising a shell and a diametrical electric curtransverse bar, a hollow body comprising a transverse tube ada ted to receive said transverse bar, a tank a apted to receive a dielec FRANZ JOSEF FISCHER. 

